Valve for internal-combustion engines



1. 0. SCHWEERS. VALVE FO R INTERNAL COMBUSTION ENGINES. APPLICAIIONFILED AUG.25,I920.

. flit I Patented D0,. 13,1921;

- A RNEY iii- TEE? dldlffi rarer-er orFlcE.

VALVE FOR IN TERNAL-COMBUSTION ENGINES.

v Specification of Letters Patent.

Patented Doc. 13. 1921.

Application filed August 25, 1920. Serial No. 405.960.

To all '11: 71 om it may cmwem Be it known that 1, JOHN D. Scnwnnns. acitizen of the United States, and a resident of Elizabeth. county ofUnion. and State of New Jersey, have invented certain new and usefulImprovements in Valves for Internal- Combustion Engines, of which thefollowing is a specification.

Thisinvcntion relates to a valve for internal combustion engines and isof the type that is used for admitting an explosive mixture to thecylinders, and is primarily designed to eliminate the necessity offrequent grinding and cleaning now necessary in valves of the commontype.

This invention relates to a valve of this kind in which the valve headis rotatable so the passage in the valve that vibration of the engine inthe quick rotation of the valve has tendency'to turn it slightly on eachstroke,.'so that a rotative Contact between the valve and its seat isestablished every time the valve is closed, this contact causing acontinual slight grinding of the valve and its seat.

The invention further consists of a valve of this kind, the head ofwhich can he pro vided with conformation. preferably on the bottom,that-permits the fluid under pressure, such as the compressed explosivemixture, engaging the valve, to positively rotate it through a partialrotation whenever such gases are permittcd to go through seat by theopcning of the valve. j

The invention is illustrated in the accompanying drawing. in which oneform'ot' the improved type of vulve'is shown. and in which drawingFigure l is an elevation of a valve with the valve seat shown insection. and 2 is a. bot-tom vicw of the valve seat.

The valve is arranged usually in the in'lct port or exhaust port of thecylindcr. part of which cyli ider is shown in elevation at 10. and isprovided with a valve scat 11. these being shown tapered. Thc valvc stcm12 is rcciprocat-ed by 'imy of the means usually employed and isordinarily held down by a spring. which is not shown. the function andlocation of which are well known and necd not he dcscrihcd hero.

Orwiilie vulvc stem is av valve head 13 which is held againstappreciable movement longitudinally of the valve stem 12, but tits onthe stem loose enough to permit the valve head to be rotated, this fitalso providing. a gas-tight joint. especially in conjunction with thehead 14 on the valve stem. which head 14 also acts to limit the upwardmovement of the valve head relative to the stem. so thatwhcn the stem ispushed down it holds the alve head in position on the valve seat.Suitable means for preventing downward movement of the valve headrelativ to the stem is provided. the form shown comprising a collar 15which is held in position by suitable means. such as the pin .16. andthe valve head is preferably provided with aslecve 17 which restsagainst the collar 15. It will be noted that if the engine. especiallythe type used on vehicles. is running. vibration is established which"will cause the head to be vibrated sufiicicutlv to rotate it slightlybetween the time the valve head leaves the seat and the time it returnsto its closed position.

It desired. l ma construct the valve head so, that it is positivelyrotated through the influence of compressed fluid. such as compressedgases. passing through theopcning or passagc in the valve seat when thevalve is open. in the form shown this comprises obliqucl v arrangedgrooves 18 arranged on the hottom face '19 of the valve head. the spacesbetween these grooves thus forming 'anes Q0. and 1 "will be readily sccnthat the' passage of such fluids under pressure along these grooves willrotate the valve head. The duration of time that the valve is open .isslight so that but a slight rotation will take place on each stroke ofthe valve. and each time the valve head is seated it will be in adifferent position relative-v to the posi tion previously occupied, sothat-the surface of the valve. where it engages the seat. and thcsurface of the scat itself. will be kept clcan and smooth and give nochance for the lodging ot' corroding or similar material on either ourof those contacting element's. since the ohliquclv arranged grooves'direct an oblique blast on thcsc slir-faces.

To permit an casier access of the fluid under prcssurc' to the grooves18 l prefer to placc an annular groovc 21 on the bottom face oi thcvalve hcad. thus insuring the entrance of such fluid to the grooves andpermitting it to cxcrt a pressure along their enth'e. lengths. Suchfluid. in the way of an explosive mixture. will also be more thoroughlymixed bv its being slightlv swirlecl in pcrforming the rotativefunction.

1% will be understood that sfight e ha-nge's can be made in the deieailsof the parts without departing 20m the scope of the invenon.

1: claim:

A valve for interim cembustion engines mmgnising a stem, 22 valve headrotatabiy Secured 0n. the end. of the stem, the valve neai having atapered edge and adapted to on e m eyed valve seat said valve headtzavislg enamel: groove on its bottom face arranged groeves extendingfrom mud-annular gmeve 0 the tapered edge, whereby fluid under pressuretraverses the grooves to 15 give retetive mevement to the head and todirect an e hiique blast on the tapered face of d'levalve seat.

In testimony that I-cleim the f0regoing I have heretoset my hand, this21st day 02'; 20

August, 1920.

JOHN D; SCHWEERS.

